Does Android apk/aab require MPEG-4 file format?

Back in Construct 2, the exported project only included the OGG files and the final apk ran fine. Now, exporting with Construct 3 keeps the MPEG-4 files, which greatly increase the file size and could be causing slower loadings.

Would it be okay if I remove the MPEG-4 prior to exporting with C3, so that the final apk/aab doesn't have them? Will there be any problem on Android?

In Construct 3 I would recommend using only WebM Opus. That is one format that works on all platforms and avoids all the problems that came with having dual-encoding.